/* Copyright (C) 2000 MySQL AB, 2008-2009 Sun Microsystems, Inc

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* This file should be included when using merge_isam_funktions */

#ifndef _myisammrg_h
#define _myisammrg_h
#ifdef	__cplusplus
extern "C" {
#endif

#ifndef _my_base_h
#include <my_base.h>
#endif
#ifndef _myisam_h
#include <myisam.h>
#endif

#include <queues.h>

#define MYRG_NAME_EXT	".MRG"

    /* In which table to INSERT rows */
#define MERGE_INSERT_DISABLED	0
#define MERGE_INSERT_TO_FIRST	1
#define MERGE_INSERT_TO_LAST	2

    extern TYPELIB merge_insert_method;

        /* Param to/from myrg_info */

    typedef struct st_mymerge_info /* Struct from h_info */ {
        ulonglong records; /* Records in database */
        ulonglong deleted; /* Deleted records in database */
        ulonglong recpos; /* Pos for last used record */
        ulonglong data_file_length;
        ulonglong dupp_key_pos; /* Offset of the Duplicate key in the merge table */
        uint reclength; /* Recordlength */
        int errkey; /* With key was dupplicated on err */
        uint options; /* HA_OPTION_... used */
        ulong *rec_per_key; /* for sql optimizing */
    } MYMERGE_INFO;

    typedef struct st_myrg_table_info {
        struct st_myisam_info *table;
        ulonglong file_offset;
    } MYRG_TABLE;

    typedef struct st_myrg_info {
        MYRG_TABLE *open_tables, *current_table, *end_table, *last_used_table;
        ulonglong records; /* records in tables */
        ulonglong del; /* Removed records */
        ulonglong data_file_length;
        ulong cache_size;
        uint merge_insert_method;
        uint tables, options, reclength, keys;
        my_bool cache_in_use;
        /* If MERGE children attached to parent. See top comment in ha_myisammrg.cc */
        my_bool children_attached;
        LIST open_list;
        QUEUE by_key;
        ulong *rec_per_key_part; /* for sql optimizing */
        mysql_mutex_t mutex;
    } MYRG_INFO;


    /* Prototypes for merge-functions */

    extern int myrg_close(MYRG_INFO *file);
    extern int myrg_delete(MYRG_INFO *file, const uchar *buff);
    extern MYRG_INFO *myrg_open(const char *name, int mode, int wait_if_locked);
    extern MYRG_INFO *myrg_parent_open(const char *parent_name,
            int (*callback)(void*, const char*),
            void *callback_param);
    extern int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
            MI_INFO *(*callback)(void*),
            void *callback_param,
            my_bool *need_compat_check);
    extern int myrg_detach_children(MYRG_INFO *m_info);
    extern int myrg_panic(enum ha_panic_function function);
    extern int myrg_rfirst(MYRG_INFO *file, uchar *buf, int inx);
    extern int myrg_rlast(MYRG_INFO *file, uchar *buf, int inx);
    extern int myrg_rnext(MYRG_INFO *file, uchar *buf, int inx);
    extern int myrg_rprev(MYRG_INFO *file, uchar *buf, int inx);
    extern int myrg_rnext_same(MYRG_INFO *file, uchar *buf);
    extern int myrg_rkey(MYRG_INFO *info, uchar *buf, int inx, const uchar *key,
            key_part_map keypart_map, enum ha_rkey_function search_flag);
    extern int myrg_rrnd(MYRG_INFO *file, uchar *buf, ulonglong pos);
    extern int myrg_rsame(MYRG_INFO *file, uchar *record, int inx);
    extern int myrg_update(MYRG_INFO *file, const uchar *old, uchar *new_rec);
    extern int myrg_write(MYRG_INFO *info, uchar *rec);
    extern int myrg_status(MYRG_INFO *file, MYMERGE_INFO *x, int flag);
    extern int myrg_lock_database(MYRG_INFO *file, int lock_type);
    extern int myrg_create(const char *name, const char **table_names,
            uint insert_method, my_bool fix_names);
    extern int myrg_extra(MYRG_INFO *file, enum ha_extra_function function,
            void *extra_arg);
    extern int myrg_reset(MYRG_INFO *info);
    extern void myrg_extrafunc(MYRG_INFO *info, invalidator_by_filename inv);
    extern ha_rows myrg_records_in_range(MYRG_INFO *info, int inx,
            key_range *min_key, key_range *max_key);
    extern ha_rows myrg_records(MYRG_INFO *info);

    extern ulonglong myrg_position(MYRG_INFO *info);
#ifdef	__cplusplus
}
#endif
#endif
